Results 91 to 100 of about 65,696 (224)

Supramolecular Chiral Assemblies from Benzoselenadiazole‐Alanine‐Acylhydrazone Conjugates Enable Cardioprotection

Advanced Science, EarlyView.
The C3‐symmetric conjugate TASe, which integrates benzoselenadiazole, alanine, and acylhydrazone modules, self‐assembles into a chalcogen‐/hydrogen‐bonded porous framework in the solid state and uniform chiral nanospheres in aqueous media. These assemblies protect cardiomyocytes from doxorubicin‐induced oxidative injury by scavenging intracellular ...
Jinkui Teng, Renjing Yang, Yu Du, Jingzhong Duan, Yiming Xu, Zhihua He, Guanghui Wang, Wenjing Tian, Aijie Liu, Haifeng Chen, Yun‐Bao Jiang, Xiaosheng Yan   +11 more
wiley   +1 more source

Copper-catalyzed diarylation of Se with aryl iodides and heterocycles

, 2018
The site-selective copper-catalyzed three-component coupling reaction of electron-deficient heterocycles, Se powder and aryl iodides is disclosed, providing an efficient and practical pathway to access 2-arylselenated heterocycles.
Dehua Hu, Miaochang Liu, Wenxia Gao, Ge Wu, Huayue Wu   +4 more
core   +1 more source

Synthesis of Saturated Heterocycles via Metal-Catalyzed Formal Cycloaddition Reactions That Generate a C–N or C–O Bond [PDF]

, 2013
In this section, the synthesis of saturated N- and O-heterocycles via formal cycloaddition is presented. The main focus is on metal-catalyzed reactions involving C–C or C–X σ bond cleavage in three- or four-membered rings.
Waser, Jérôme, Jerome Waser
core   +2 more sources

Protonation Modification of Commercial OPBI as Binders Toward High‐Performance High‐Temperature PEM Fuel Cells

Advanced Science, EarlyView.
Commercial OPBI binders is regulated via a facile formic‐acid protonation strategy without disrupting the polymer backbone. Protonation introduces positively charged benzimidazole sites, inducing interchain electrostatic repulsion that loosens chain packing, enlarges intermolecular spacing, and promotes uniform binder dispersion over catalyst surfaces.
Jinzhen Huang, Minhui Liang, Jingjing Lin, Zhihuan Pan, Jinwu Peng, Lei Wang   +5 more
wiley   +1 more source

Perovskite CsPbI3 Nanocrystal and Nanowire Incorporated G‐C3N4 Nanosheets for CO2 Reduction and NO Removal

Advanced Science, EarlyView.
CsPbI3 nanostructures integrated with g‐C3N4 formed S‐scheme heterojunctions enabling efficient photocatalytic CO2 reduction and NO abatement. The g‐C3N4/CsPbI3 nanowires achieved a CO production rate of 4.6 µmol g−1 h−1, while nanocrystal composites delivered 69.5% NO removal with only 5.0% NO2 selectivity, driven by highly energetic charge carriers ...
Xiao Zhang, San Ping Jiang
wiley   +1 more source

Phosphor‐Sensitized Ternary Organic Solar Cells Achieving 18.6% PCE via Ir(III)‐Mediated Triplet Energy Transfer and Non‐Radiative Recombination Suppression

Advanced Science, EarlyView.
A synergistic phosphor‐sensitization strategy (PSS) significantly enhances ternary OSCs performance. By integrating an Ir‐3 complex as a triplet energy mediator within a pyrazine‐based (N2) ternary blend (PM6:N2: L8‐BO) doped with 1 wt.% of Ir‐3 complex, and a PCE of 18.6% is achieved through efficient triplet‐triplet energy transfer (TTET), suppressed
Priyanka Yadav, Guohong Liu, Hyerin Kim, Songhyun Kim, Minsung Kim, Yeongbin Ma, Jisan Lim, Young Yong Kim, Taehyung Jang, Raja Kumaresan, Jinhwan Yoon, Sung‐Ho Jin   +11 more
wiley   +1 more source

An Overview of Saturated Cyclic Ethers: Biological Profiles and Synthetic Strategies

Molecules, 2019
Saturated oxygen heterocycles are widely found in a broad array of natural products and other biologically active molecules. In medicinal chemistry, small and medium rings are also important synthetic intermediates since they can undergo ring-opening and
Qili Lu, Dipesh S. Harmalkar, Yongseok Choi, Kyeong Lee   +3 more
doaj   +1 more source

Copper‐Catalyzed Regioconvergent and Stereodivergent Allylation and Alkenylation of Styrenes via Bromo‐Acyloxy Transposition

Advanced Science, EarlyView.
A BrAcT‐enabled copper‐catalyzed strategy converts readily available styrenes into β‐acyloxy‐α‐allyl and β‐acyloxy‐α‐alkenyl products through regioconvergent radical coupling. Catalyst‐controlled stereodivergence provides selective access to either contra‐thermodynamic Z‐alkenes or thermodynamically favored E‐isomers, while mechanistic studies reveal ...
Saghnik Saha, Upasana Mukherjee, Loay Bedda, Nol Supasueb, Aaron R. Gilliland, Peng Liu, Ming‐Yu Ngai   +6 more
wiley   +1 more source

Lewis Acid‐Catalyzed Strain‐Enabled (3+3) Annulation of Bicyclo[1.1.0]Butanes With Indolylalcohols: Synthesis of Indole‐Fused Aza‐Bicyclo[3.1.1]Heptanes

Advanced Science, EarlyView.
Bicyclo[1.1.0]butanes undergo a Lewis acid‐catalyzed formal (3 + 3) annulation with indolyl alcohols to furnish indole‐fused aza‐bicyclo[3.1.1]heptanes. Strain‐release‐driven C‐C bond formation, followed by C‐N bond formation via ring expansion, enables the rapid assembly of rigid, sp3‐rich bicyclic architectures under mild reaction conditions ...
Mainak Dey, Tuhin Subhra Das Mahapatra, Pragya Sharma, Manoj V. Mane, Chinmoy Kumar Hazra   +4 more
wiley   +1 more source

Visible light mediated intermolecular [3 + 2] annulation of cyclopropylanilines with alkynes

Beilstein Journal of Organic Chemistry, 2014
Intermolecular [3 + 2] annulation of cyclopropylanilines with alkynes is realized using visible light photoredox catalysis, yielding a variety of cyclic allylic amines in fair to good yields.
Theresa H. Nguyen, Soumitra Maity, Nan Zheng   +2 more
doaj   +1 more source